Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Sales and Service Revenues
Product sales	$ 15,073	$ 16,091	$ 16,004
Service revenues	11,339	12,052	11,646
Total sales and service revenues	26,412	28,143	27,650
Cost of Sales and Service Revenues
Cost of product sales	11,491	12,558	12,648
Cost of service revenues	9,295	10,291	10,157
General and administrative expenses	2,350	2,467	2,571
Operating income	3,276	2,827	2,274
Other (expense) income
Interest expense	(221)	(269)	(269)
Charge on debt redemption		(229)
Other, net	28	37	65
Earnings from continuing operations before income taxes	3,083	2,366	2,070
Federal and foreign income tax expense	997	462	636
Earnings from continuing operations	2,086	1,904	1,434
Earnings from discontinued operations, net of tax	32	149	252
Net earnings	2,118	2,053	1,686
Basic Earnings Per Share
Continuing operations	$ 7.54	$ 6.41	$ 4.49
Discontinued operations	$ 0.11	$ 0.50	$ 0.79
Basic earnings per share	$ 7.65	$ 6.91	$ 5.28
Weighted-average common shares outstanding, in millions	276.8	296.9	319.2
Diluted Earnings Per Share
Continuing operations	$ 7.41	$ 6.32	$ 4.44
Discontinued operations	$ 0.11	$ 0.50	$ 0.77
Diluted earnings per share	$ 7.52	$ 6.82	$ 5.21
Weighted-average diluted shares outstanding, in millions	281.6	301.1	323.3
Net earnings (from above)	2,118	2,053	1,686
Other comprehensive (loss) income
Change in cumulative translation adjustment	(4)	(41)	31
Change in unrealized (loss) gain on marketable securities and cash flow hedges, net of tax benefit (expense) of $2 in 2011 and $0 in 2010, and $(23) in 2009	(4)	1	36
Change in unamortized benefit plan costs, net of tax benefit (expense) of $823 in 2011 $(183) in 2010, $(374) in 2009	(1,249)	297	561
Other comprehensive (loss) income, net of tax	(1,257)	257	628
Comprehensive income	$ 861	$ 2,310	$ 2,314